/*******************************************************************************
 * Copyright (c) 2009 Dmitry Grushin <dgrushin@gmail.com>.
 * 
 * This file is part of GridMe.
 * 
 * GridMe is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * GridMe is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with GridMe.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     Dmitry Grushin <dgrushin@gmail.com> - initial API and implementation
 ******************************************************************************/
package gmodel.diagram.edit.parts;

import gmodel.diagram.edit.policies.GmodelTextSelectionEditPolicy;
import gmodel.diagram.providers.GmodelElementTypes;
import gmodel.diagram.providers.GmodelParserProvider;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.Label;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.transaction.RunnableWithResult;
import org.eclipse.gef.AccessibleEditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.NonResizableEditPolicy;
import org.eclipse.gef.handles.NonResizableHandleKit;
import org.eclipse.gef.requests.DirectEditRequest;
import org.eclipse.gef.tools.DirectEditManager;
import org.eclipse.gmf.runtime.common.ui.services.parser.IParser;
import org.eclipse.gmf.runtime.common.ui.services.parser.IParserEditStatus;
import org.eclipse.gmf.runtime.common.ui.services.parser.ParserEditStatus;
import org.eclipse.gmf.runtime.common.ui.services.parser.ParserOptions;
import org.eclipse.gmf.runtime.common.ui.services.parser.ParserService;
import org.eclipse.gmf.runtime.diagram.ui.editparts.CompartmentEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.ITextAwareEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.LabelDirectEditPolicy;
import org.eclipse.gmf.runtime.diagram.ui.l10n.DiagramColorRegistry;
import org.eclipse.gmf.runtime.diagram.ui.requests.RequestConstants;
import org.eclipse.gmf.runtime.diagram.ui.tools.TextDirectEditManager;
import org.eclipse.gmf.runtime.draw2d.ui.figures.WrappingLabel;
import org.eclipse.gmf.runtime.emf.core.util.EObjectAdapter;
import org.eclipse.gmf.runtime.emf.ui.services.parser.ISemanticParser;
import org.eclipse.gmf.runtime.notation.FontStyle;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.jface.viewers.ICellEditorValidator;
import org.eclipse.swt.SWT;
import org.eclipse.swt.accessibility.AccessibleEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.Image;

/**
* @generated
*/
public class ConnectionNameEditPart extends CompartmentEditPart implements
    ITextAwareEditPart
{

  /**
  * @generated
  */
  public static final int VISUAL_ID = 5001;

  /**
  * @generated
  */
  private DirectEditManager manager;

  /**
  * @generated
  */
  private IParser parser;

  /**
  * @generated
  */
  private List parserElements;

  /**
  * @generated
  */
  private String defaultText;

  /**
  * @generated
  */
  public ConnectionNameEditPart(View view)
  {
    super(view);
  }

  /**
  * @generated
  */
  protected void createDefaultEditPolicies()
  {
    super.createDefaultEditPolicies();
    installEditPolicy(EditPolicy.DIRECT_EDIT_ROLE, new LabelDirectEditPolicy());
    installEditPolicy(EditPolicy.PRIMARY_DRAG_ROLE,
        new NonResizableEditPolicy()
        {

          protected List createSelectionHandles()
          {
            List handles = new ArrayList();
            NonResizableHandleKit.addMoveHandle((GraphicalEditPart) getHost(),
                handles);
            return handles;
          }

          public Command getCommand(Request request)
          {
            return null;
          }

          public boolean understandsRequest(Request request)
          {
            return false;
          }
        });
  }

  /**
  * @generated
  */
  protected String getLabelTextHelper(IFigure figure)
  {
    if(figure instanceof WrappingLabel)
    {
      return ((WrappingLabel) figure).getText();
    }
    else
    {
      return ((Label) figure).getText();
    }
  }

  /**
  * @generated
  */
  protected void setLabelTextHelper(IFigure figure, String text)
  {
    if(figure instanceof WrappingLabel)
    {
      ((WrappingLabel) figure).setText(text);
    }
    else
    {
      ((Label) figure).setText(text);
    }
  }

  /**
  * @generated
  */
  protected Image getLabelIconHelper(IFigure figure)
  {
    if(figure instanceof WrappingLabel)
    {
      return ((WrappingLabel) figure).getIcon();
    }
    else
    {
      return ((Label) figure).getIcon();
    }
  }

  /**
  * @generated
  */
  protected void setLabelIconHelper(IFigure figure, Image icon)
  {
    if(figure instanceof WrappingLabel)
    {
      ((WrappingLabel) figure).setIcon(icon);
    }
    else
    {
      ((Label) figure).setIcon(icon);
    }
  }

  /**
  * @generated
  */
  public void setLabel(Label figure)
  {
    unregisterVisuals();
    setFigure(figure);
    defaultText = getLabelTextHelper(figure);
    registerVisuals();
    refreshVisuals();
  }

  /**
  * @generated
  */
  protected List getModelChildren()
  {
    return Collections.EMPTY_LIST;
  }

  /**
  * @generated
  */
  public IGraphicalEditPart getChildBySemanticHint(String semanticHint)
  {
    return null;
  }

  /**
  * @generated
  */
  protected EObject getParserElement()
  {
    return resolveSemanticElement();
  }

  /**
  * @generated
  */
  protected Image getLabelIcon()
  {
    EObject parserElement = getParserElement();
    if(parserElement == null)
    {
      return null;
    }
    return GmodelElementTypes.getImage(parserElement.eClass());
  }

  /**
  * @generated
  */
  protected String getLabelText()
  {
    String text = null;
    EObject parserElement = getParserElement();
    if(parserElement != null && getParser() != null)
    {
      text = getParser().getPrintString(new EObjectAdapter(parserElement),
          getParserOptions().intValue());
    }
    if(text == null || text.length() == 0)
    {
      text = defaultText;
    }
    return text;
  }

  /**
  * @generated
  */
  public void setLabelText(String text)
  {
    setLabelTextHelper(getFigure(), text);
    Object pdEditPolicy = getEditPolicy(EditPolicy.PRIMARY_DRAG_ROLE);
    if(pdEditPolicy instanceof GmodelTextSelectionEditPolicy)
    {
      ((GmodelTextSelectionEditPolicy) pdEditPolicy).refreshFeedback();
    }
  }

  /**
  * @generated
  */
  public String getEditText()
  {
    if(getParserElement() == null || getParser() == null)
    {
      return ""; //$NON-NLS-1$
    }
    return getParser().getEditString(new EObjectAdapter(getParserElement()),
        getParserOptions().intValue());
  }

  /**
  * @generated
  */
  protected boolean isEditable()
  {
    return getParser() != null;
  }

  /**
  * @generated
  */
  public ICellEditorValidator getEditTextValidator()
  {
    return new ICellEditorValidator()
    {

      public String isValid(final Object value)
      {
        if(value instanceof String)
        {
          final EObject element = getParserElement();
          final IParser parser = getParser();
          try
          {
            IParserEditStatus valid = (IParserEditStatus) getEditingDomain()
                .runExclusive(new RunnableWithResult.Impl()
                {

                  public void run()
                  {
                    setResult(parser.isValidEditString(new EObjectAdapter(
                        element), (String) value));
                  }
                });
            return valid.getCode() == ParserEditStatus.EDITABLE ? null : valid
                .getMessage();
          }
          catch(InterruptedException ie)
          {
            ie.printStackTrace();
          }
        }

        // shouldn't get here
        return null;
      }
    };
  }

  /**
  * @generated
  */
  public IContentAssistProcessor getCompletionProcessor()
  {
    if(getParserElement() == null || getParser() == null)
    {
      return null;
    }
    return getParser().getCompletionProcessor(
        new EObjectAdapter(getParserElement()));
  }

  /**
  * @generated
  */
  public ParserOptions getParserOptions()
  {
    return ParserOptions.NONE;
  }

  /**
  * @generated
  */
  public IParser getParser()
  {
    if(parser == null)
    {
      String parserHint = ((View) getModel()).getType();
      IAdaptable hintAdapter = new GmodelParserProvider.HintAdapter(
          GmodelElementTypes.Connection_2001, getParserElement(), parserHint);
      parser = ParserService.getInstance().getParser(hintAdapter);
    }
    return parser;
  }

  /**
  * @generated
  */
  protected DirectEditManager getManager()
  {
    if(manager == null)
    {
      setManager(new TextDirectEditManager(this, TextDirectEditManager
          .getTextCellEditorClass(this), GmodelEditPartFactory
          .getTextCellEditorLocator(this)));
    }
    return manager;
  }

  /**
  * @generated
  */
  protected void setManager(DirectEditManager manager)
  {
    this.manager = manager;
  }

  /**
  * @generated
  */
  protected void performDirectEdit()
  {
    getManager().show();
  }

  /**
  * @generated
  */
  protected void performDirectEdit(Point eventLocation)
  {
    if(getManager().getClass() == TextDirectEditManager.class)
    {
      ((TextDirectEditManager) getManager()).show(eventLocation.getSWTPoint());
    }
  }

  /**
  * @generated
  */
  private void performDirectEdit(char initialCharacter)
  {
    if(getManager() instanceof TextDirectEditManager)
    {
      ((TextDirectEditManager) getManager()).show(initialCharacter);
    }
    else
    {
      performDirectEdit();
    }
  }

  /**
  * @generated
  */
  protected void performDirectEditRequest(Request request)
  {
    final Request theRequest = request;
    try
    {
      getEditingDomain().runExclusive(new Runnable()
      {

        public void run()
        {
          if(isActive() && isEditable())
          {
            if(theRequest.getExtendedData().get(
                RequestConstants.REQ_DIRECTEDIT_EXTENDEDDATA_INITIAL_CHAR) instanceof Character)
            {
              Character initialChar = (Character) theRequest
                  .getExtendedData()
                  .get(
                      RequestConstants.REQ_DIRECTEDIT_EXTENDEDDATA_INITIAL_CHAR);
              performDirectEdit(initialChar.charValue());
            }
            else if((theRequest instanceof DirectEditRequest)
                && (getEditText().equals(getLabelText())))
            {
              DirectEditRequest editRequest = (DirectEditRequest) theRequest;
              performDirectEdit(editRequest.getLocation());
            }
            else
            {
              performDirectEdit();
            }
          }
        }
      });
    }
    catch(InterruptedException e)
    {
      e.printStackTrace();
    }
  }

  /**
  * @generated
  */
  protected void refreshVisuals()
  {
    super.refreshVisuals();
    refreshLabel();
    refreshFont();
    refreshFontColor();
    refreshUnderline();
    refreshStrikeThrough();
  }

  /**
  * @generated
  */
  protected void refreshLabel()
  {
    setLabelTextHelper(getFigure(), getLabelText());
    setLabelIconHelper(getFigure(), getLabelIcon());
    Object pdEditPolicy = getEditPolicy(EditPolicy.PRIMARY_DRAG_ROLE);
    if(pdEditPolicy instanceof GmodelTextSelectionEditPolicy)
    {
      ((GmodelTextSelectionEditPolicy) pdEditPolicy).refreshFeedback();
    }
  }

  /**
  * @generated
  */
  protected void refreshUnderline()
  {
    FontStyle style = (FontStyle) getFontStyleOwnerView().getStyle(
        NotationPackage.eINSTANCE.getFontStyle());
    if(style != null && getFigure() instanceof WrappingLabel)
    {
      ((WrappingLabel) getFigure()).setTextUnderline(style.isUnderline());
    }
  }

  /**
  * @generated
  */
  protected void refreshStrikeThrough()
  {
    FontStyle style = (FontStyle) getFontStyleOwnerView().getStyle(
        NotationPackage.eINSTANCE.getFontStyle());
    if(style != null && getFigure() instanceof WrappingLabel)
    {
      ((WrappingLabel) getFigure()).setTextStrikeThrough(style
          .isStrikeThrough());
    }
  }

  /**
  * @generated
  */
  protected void refreshFont()
  {
    FontStyle style = (FontStyle) getFontStyleOwnerView().getStyle(
        NotationPackage.eINSTANCE.getFontStyle());
    if(style != null)
    {
      FontData fontData = new FontData(style.getFontName(), style
          .getFontHeight(), (style.isBold() ? SWT.BOLD : SWT.NORMAL)
          | (style.isItalic() ? SWT.ITALIC : SWT.NORMAL));
      setFont(fontData);
    }
  }

  /**
  * @generated
  */
  protected void setFontColor(Color color)
  {
    getFigure().setForegroundColor(color);
  }

  /**
  * @generated
  */
  protected void addSemanticListeners()
  {
    if(getParser() instanceof ISemanticParser)
    {
      EObject element = resolveSemanticElement();
      parserElements = ((ISemanticParser) getParser())
          .getSemanticElementsBeingParsed(element);
      for(int i = 0; i < parserElements.size(); i++)
      {
        addListenerFilter(
            "SemanticModel" + i, this, (EObject) parserElements.get(i)); //$NON-NLS-1$
      }
    }
    else
    {
      super.addSemanticListeners();
    }
  }

  /**
  * @generated
  */
  protected void removeSemanticListeners()
  {
    if(parserElements != null)
    {
      for(int i = 0; i < parserElements.size(); i++)
      {
        removeListenerFilter("SemanticModel" + i); //$NON-NLS-1$
      }
    }
    else
    {
      super.removeSemanticListeners();
    }
  }

  /**
  * @generated
  */
  protected AccessibleEditPart getAccessibleEditPart()
  {
    if(accessibleEP == null)
    {
      accessibleEP = new AccessibleGraphicalEditPart()
      {

        public void getName(AccessibleEvent e)
        {
          e.result = getLabelTextHelper(getFigure());
        }
      };
    }
    return accessibleEP;
  }

  /**
  * @generated
  */
  private View getFontStyleOwnerView()
  {
    return getPrimaryView();
  }

  /**
  * @generated
  */
  protected void addNotationalListeners()
  {
    super.addNotationalListeners();
    addListenerFilter("PrimaryView", this, getPrimaryView()); //$NON-NLS-1$
  }

  /**
  * @generated
  */
  protected void removeNotationalListeners()
  {
    super.removeNotationalListeners();
    removeListenerFilter("PrimaryView"); //$NON-NLS-1$
  }

  /**
  * @generated
  */
  protected void handleNotificationEvent(Notification event)
  {
    Object feature = event.getFeature();
    if(NotationPackage.eINSTANCE.getFontStyle_FontColor().equals(feature))
    {
      Integer c = (Integer) event.getNewValue();
      setFontColor(DiagramColorRegistry.getInstance().getColor(c));
    }
    else if(NotationPackage.eINSTANCE.getFontStyle_Underline().equals(feature))
    {
      refreshUnderline();
    }
    else if(NotationPackage.eINSTANCE.getFontStyle_StrikeThrough().equals(
        feature))
    {
      refreshStrikeThrough();
    }
    else if(NotationPackage.eINSTANCE.getFontStyle_FontHeight().equals(feature)
        || NotationPackage.eINSTANCE.getFontStyle_FontName().equals(feature)
        || NotationPackage.eINSTANCE.getFontStyle_Bold().equals(feature)
        || NotationPackage.eINSTANCE.getFontStyle_Italic().equals(feature))
    {
      refreshFont();
    }
    else
    {
      if(getParser() != null
          && getParser().isAffectingEvent(event, getParserOptions().intValue()))
      {
        refreshLabel();
      }
      if(getParser() instanceof ISemanticParser)
      {
        ISemanticParser modelParser = (ISemanticParser) getParser();
        if(modelParser.areSemanticElementsAffected(null, event))
        {
          removeSemanticListeners();
          if(resolveSemanticElement() != null)
          {
            addSemanticListeners();
          }
          refreshLabel();
        }
      }
    }
    super.handleNotificationEvent(event);
  }

  /**
  * @generated
  */
  protected IFigure createFigure()
  {
    // Parent should assign one using setLabel() method
    return null;
  }

}
